在iOS 7中设置UIButton图像会产生蓝色按钮

问题描述

在iOS 6 SDK上，我编写了以下代码行来显示按钮内的图像：

On iOS 6 SDK I wrote the following lines of code to display an image inside a button:

NSURL *thumbURL2 = [NSURL URLWithString:@"http://example.com/thumbs/2.jpg"];
NSData *thumbData2 = [NSData dataWithContentsOfURL:thumbURL2];
UIImage *thumb2 = [UIImage imageWithData:thumbData2];
[btn2 setImage:thumb2 forState:UIControlStateNormal];
[self.view addSubview:btn2];

但是现在使用Xcode 5和iOS 7这不起作用。该按钮不包含图像。按钮用蓝色填充。

But now with Xcode 5 and iOS 7 this doesn't work. The button doesn't contain the image. The button is filled with blue color.

推荐答案

在iOS7中有一个名为UIButtonTypeSystem的新按钮类型NS_ENUM_AVAILABLE_IOS（7_0），//标准系统按钮

In iOS7 there is new button type called UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0), // standard system button

检查.xib文件并将按钮类型更改为自定义

Check your .xib file and change button type to Custom

要以编程方式执行此操作，请将此行添加到 viewDidLoad ：

To do this programmatically, add this line to the viewDidLoad:

[UIButton buttonWithType:UIButtonTypeSystem];

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